From what I understand, the Air Force quarterback got injured, started walking off, but then went down while still on the field, which allowed Air Force to kind of huddle up and give the backup more time to warm up while the QB was treated on the field rather than on the sideline. Then the starting QB came back in the game after the next play. The injury wasn't necessarily fake, the Air Force QB was just smart.
Just read the link above now.
Tl;dr The Wyoming coach is butthurt that his team gave up a gamewinning drive.

playing air force on military appreciation night. Then the swearing tirade. oh the irony.
on an aside, I am in the Air Force, and we speak to each other this way daily, when i am extra mad i just add a few explatives, to prove my anger.